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To evaluate the efficiency of three cleaners on GS 34 Soil-2 from stainless steel coupons using immersion technique.
wo sets of stainless-steel coupons were weighed. Both sets were soiled with GS 34 Soil-2. The soil was applied at the loading of ~100mg. The soiled coupons were oven dried for 30 minutes at 105 °C for GS 34 Soil-2. Dirty weights were recorded for all of the coupons.
The nClean product was 6 oz/gal (4.7%), the Multipurpose Fury 14oz/gal (11%) and the Krud Kutter at the supplied ready to use concentration. Three coupons were placed in a Gardner Straightline Washability unit and spray with a cleaning solution and allowed to soak for 20 minutes. After soaking, the unit was run for 20 cycles (33 seconds) followed by a quick spray rinse using tap water at room temperature. Final weights were recorded the following day. Efficiencies were calculated and recorded.
In addition to the manually wiped coupons, a second set of coupons was sprayed with the cleaners. These coupons were allowed to sit 20 minutes. No wiping was used, and the coupons were only rinsed with tap water. Final weights were recorded the following day. Efficiencies were calculated and recorded.
Soil 2: Production soil = 200 ml Quench Oil and 200 ml cutting oil
The manual wiping of the maintenance soil was effectively removed with each of the three products with each product removing over 95% of the soil mixture. The Fury product had slightly better removal than the Krud Kutter and nClean (F: 98.32 – KK: 97.79-nC: 96.72).
During the apply-and-rinse cleaning all three products had improved soil removal when allowing the products to soak for 20 minutes. The products performed in a better than the manual wiping with nearly complete removal of the soil. Removal rates were nearly identical for each of the three products.
|Cleaner||Initial wt||Final wt||% Removed|
|nClean - wipe|
|Multiclean Fury -wipe|
|Krud Kutter - wipe|
|nClean - no wipe 20 soak|
|Multiclean Fury - no wipe and 20 soak|
|Krud Kutter - no wipe and 20 soak|
Success Rating:Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
The nClean product worked as well as the two comparative products under the manual wiping and extended soak and rinse scenarios.